File Form 1040A by
April 15, 2013. If you file after this date, you may have to pay interest and penalties. See
Interest and Penalties, later.
If you were serving in, or in support of, the U.S. Armed Forces in a designated combat zone or contingency operation, you may be able to file later. See Pub.
3 for details.
Filing instructions and addresses are at the end of these instructions.